Improve error handling in Transmodel API

[t2gran]

Is your feature request related to a problem? Please describe.

We want a clear user-friendly error message following the GraphQL error structure to be returned to the client when invalid data is submitted. We do not want to log this on the server side.

Here is an example:

  trip(
    from:{
       name:"Bjerkealleen5A,Skedsmo",
       coordinates:{ latitude:59.96050414081307, longitude:11.040338686322317 }
    }
    to:{
       place:"NSR:StopPlace:385",
       name:"Alna,Oslo"
    }
    dateTime:"2024-11-15T12:03:55.232+00:00"
    modes:{ directMode:foot }
    via:{
       visit:{
          stopLocationIds:""
        }
     }
  ) {
    tripPatterns{
      expectedStartTime
      duration
      distance
      legs{
         mode
         distance
         line{
            id
            publicCode
         }
     }
  }

Describe the solution you'd like
We want this both when the validation happens in the GraphQL request mapping layer and for semantic validation in the OTP domain logic.